/Library/Frameworks/dummy.framework/dummy: no matching architecture in universal wrapper
Since the python in Snow Leopard is 64-bit in default, for those libraries which does not support 64-bit. You can test your library by
% file /Library/Frameworks/dummy.framework/Versions/Current/dummy
If you library is i386 only, you may need to handle it in this way.
% export VERSIONER_PYTHON_PREFER_32_BIT=yes
% python your_script.py
For more information, you can read the man page in your Snow Leopard.